/*
 * Copyright (c) 2015
 *
 * This file is licensed under the Affero General Public License version 3
 * or later.
 *
 * See the COPYING-README file.
 *
 */

(function() {
	if(!OC.Share) {
		OC.Share = {};
	}

	var TEMPLATE_BASE =
		'<div class="resharerInfoView subView"></div>' +
		'{{#if isSharingAllowed}}' +
		'<label for="shareWith-{{cid}}" class="hidden-visually">{{shareLabel}}</label>' +
		'<div class="oneline">' +
		'    <input id="shareWith-{{cid}}" class="shareWithField" type="text" placeholder="{{sharePlaceholder}}" />' +
		'    <span class="shareWithLoading icon-loading-small hidden"></span>'+
		'{{{remoteShareInfo}}}' +
		'</div>' +
		'{{/if}}' +
		'<div class="shareeListView subView"></div>' +
		'<div class="linkShareView subView"></div>' +
		'<div class="expirationView subView"></div>' +
		'<div class="loading hidden" style="height: 50px"></div>';

	var TEMPLATE_REMOTE_SHARE_INFO =
		'<a target="_blank" class="icon-info svg shareWithRemoteInfo hasTooltip" href="{{docLink}}" ' +
		'title="{{tooltip}}"></a>';

	/**
	 * @class OCA.Share.ShareDialogView
	 * @member {OC.Share.ShareItemModel} model
	 * @member {jQuery} $el
	 * @memberof OCA.Sharing
	 * @classdesc
	 *
	 * Represents the GUI of the share dialogue
	 *
	 */
	var ShareDialogView = OC.Backbone.View.extend({
		/** @type {Object} **/
		_templates: {},

		/** @type {boolean} **/
		_showLink: true,

		/** @type {string} **/
		tagName: 'div',

		/** @type {OC.Share.ShareConfigModel} **/
		configModel: undefined,

		/** @type {object} **/
		resharerInfoView: undefined,

		/** @type {object} **/
		linkShareView: undefined,

		/** @type {object} **/
		expirationView: undefined,

		/** @type {object} **/
		shareeListView: undefined,

		initialize: function(options) {
			var view = this;

			this.model.on('fetchError', function() {
				OC.Notification.showTemporary(t('core', 'Share details could not be loaded for this item.'));
			});

			if(!_.isUndefined(options.configModel)) {
				this.configModel = options.configModel;
			} else {
				throw 'missing OC.Share.ShareConfigModel';
			}

			this.configModel.on('change:isRemoteShareAllowed', function() {
				view.render();
			});
			this.model.on('change:permissions', function() {
				view.render();
			});

			this.model.on('request', this._onRequest, this);
			this.model.on('sync', this._onEndRequest, this);

			var subViewOptions = {
				model: this.model,
				configModel: this.configModel
			};

			var subViews = {
				resharerInfoView: 'ShareDialogResharerInfoView',
				linkShareView: 'ShareDialogLinkShareView',
				expirationView: 'ShareDialogExpirationView',
				shareeListView: 'ShareDialogShareeListView'
			};

			for(var name in subViews) {
				var className = subViews[name];
				this[name] = _.isUndefined(options[name])
					? new OC.Share[className](subViewOptions)
					: options[name];
			}

			_.bindAll(this, 'autocompleteHandler', '_onSelectRecipient');
		},

		autocompleteHandler: function (search, response) {
			var view = this;
			var $loading = this.$el.find('.shareWithLoading');
			$loading.removeClass('hidden');
			$loading.addClass('inlineblock');
			$.get(
				OC.linkToOCS('apps/files_sharing/api/v1') + 'sharees',
				{
					format: 'json',
					search: search.term.trim(),
					perPage: 200,
					itemType: view.model.get('itemType')
				},
				function (result) {
					$loading.addClass('hidden');
					$loading.removeClass('inlineblock');
					if (result.ocs.meta.statuscode == 100) {
						var users   = result.ocs.data.exact.users.concat(result.ocs.data.users);
						var groups  = result.ocs.data.exact.groups.concat(result.ocs.data.groups);
						var remotes = result.ocs.data.exact.remotes.concat(result.ocs.data.remotes);

						var usersLength;
						var groupsLength;
						var remotesLength;

						var i, j;

						//Filter out the current user
						usersLength = users.length;
						for (i = 0 ; i < usersLength; i++) {
							if (users[i].value.shareWith === OC.currentUser) {
								users.splice(i, 1);
								break;
							}
						}

						// Filter out the owner of the share
						if (view.model.hasReshare()) {
							usersLength = users.length;
							for (i = 0 ; i < usersLength; i++) {
								if (users[i].value.shareWith === view.model.getReshareOwner()) {
									users.splice(i, 1);
									break;
								}
							}
						}

						var shares = view.model.get('shares');
						var sharesLength = shares.length;

						// Now filter out all sharees that are already shared with
						for (i = 0; i < sharesLength; i++) {
							var share = shares[i];

							if (share.share_type === OC.Share.SHARE_TYPE_USER) {
								usersLength = users.length;
								for (j = 0; j < usersLength; j++) {
									if (users[j].value.shareWith === share.share_with) {
										users.splice(j, 1);
										break;
									}
								}
							} else if (share.share_type === OC.Share.SHARE_TYPE_GROUP) {
								groupsLength = groups.length;
								for (j = 0; j < groupsLength; j++) {
									if (groups[j].value.shareWith === share.share_with) {
										groups.splice(j, 1);
										break;
									}
								}
							} else if (share.share_type === OC.Share.SHARE_TYPE_REMOTE) {
								remotesLength = remotes.length;
								for (j = 0; j < remotesLength; j++) {
									if (remotes[j].value.shareWith === share.share_with) {
										remotes.splice(j, 1);
										break;
									}
								}
							}
						}

						var suggestions = users.concat(groups).concat(remotes);

						if (suggestions.length > 0) {
							$('.shareWithField').autocomplete("option", "autoFocus", true);
							response(suggestions);
						} else {
							response();
						}
					} else {
						response();
					}
				}
			).fail(function() {
				$loading.addClass('hidden');
				$loading.removeClass('inlineblock');
				OC.Notification.show(t('core', 'An error occured. Please try again'));
				window.setTimeout(OC.Notification.hide, 5000);
			});
		},

		autocompleteRenderItem: function(ul, item) {
			var insert = $("<a>");
			var text = item.label;
			if (item.value.shareType === OC.Share.SHARE_TYPE_GROUP) {
				text = text +  ' ('+t('core', 'group')+')';
			} else if (item.value.shareType === OC.Share.SHARE_TYPE_REMOTE) {
				text = text +  ' ('+t('core', 'remote')+')';
			}
			insert.text(text);
			if(item.value.shareType === OC.Share.SHARE_TYPE_GROUP) {
				insert = insert.wrapInner('<strong></strong>');
			}
			return $("<li>")
				.addClass((item.value.shareType === OC.Share.SHARE_TYPE_GROUP) ? 'group' : 'user')
				.append(insert)
				.appendTo(ul);
		},

		_onSelectRecipient: function(e, s) {
			e.preventDefault();
			$(e.target).val('');
			this.model.addShare(s.item.value);
		},

		_toggleLoading: function(state) {
			this._loading = state;
			this.$el.find('.subView').toggleClass('hidden', state);
			this.$el.find('.loading').toggleClass('hidden', !state);
		},

		_onRequest: function() {
			// only show the loading spinner for the first request (for now)
			if (!this._loadingOnce) {
				this._toggleLoading(true);
			}
		},

		_onEndRequest: function() {
			var self = this;
			this._toggleLoading(false);
			if (!this._loadingOnce) {
				this._loadingOnce = true;
				// the first time, focus on the share field after the spinner disappeared
				_.defer(function() {
					self.$('.shareWithField').focus();
				});
			}
		},

		render: function() {
			var baseTemplate = this._getTemplate('base', TEMPLATE_BASE);

			this.$el.html(baseTemplate({
				cid: this.cid,
				shareLabel: t('core', 'Share'),
				sharePlaceholder: this._renderSharePlaceholderPart(),
				remoteShareInfo: this._renderRemoteShareInfoPart(),
				isSharingAllowed: this.model.sharePermissionPossible()
			}));

			var $shareField = this.$el.find('.shareWithField');
			if ($shareField.length) {
				$shareField.autocomplete({
					minLength: 2,
					delay: 750,
					focus: function(event) {
						event.preventDefault();
					},
					source: this.autocompleteHandler,
					select: this._onSelectRecipient
				}).data('ui-autocomplete')._renderItem = this.autocompleteRenderItem;
			}

			this.resharerInfoView.$el = this.$el.find('.resharerInfoView');
			this.resharerInfoView.render();

			this.linkShareView.$el = this.$el.find('.linkShareView');
			this.linkShareView.render();

			this.expirationView.$el = this.$el.find('.expirationView');
			this.expirationView.render();

			this.shareeListView.$el = this.$el.find('.shareeListView');
			this.shareeListView.render();

			this.$el.find('.hasTooltip').tooltip();

			return this;
		},

		/**
		 * sets whether share by link should be displayed or not. Default is
		 * true.
		 *
		 * @param {bool} showLink
		 */
		setShowLink: function(showLink) {
			this._showLink = (typeof showLink === 'boolean') ? showLink : true;
			this.linkShareView.showLink = this._showLink;
		},

		_renderRemoteShareInfoPart: function() {
			var remoteShareInfo = '';
			if(this.configModel.get('isRemoteShareAllowed')) {
				var infoTemplate = this._getRemoteShareInfoTemplate();
				remoteShareInfo = infoTemplate({
					docLink: this.configModel.getFederatedShareDocLink(),
					tooltip: t('core', 'Share with people on other ownClouds using the syntax username@example.com/owncloud')
				});
			}

			return remoteShareInfo;
		},

		_renderSharePlaceholderPart: function () {
			var sharePlaceholder = t('core', 'Share with users or groups …');
			if (this.configModel.get('isRemoteShareAllowed')) {
				sharePlaceholder = t('core', 'Share with users, groups or remote users …');
			}
			return sharePlaceholder;
		},

		/**
		 *
		 * @param {string} key - an identifier for the template
		 * @param {string} template - the HTML to be compiled by Handlebars
		 * @returns {Function} from Handlebars
		 * @private
		 */
		_getTemplate: function (key, template) {
			if (!this._templates[key]) {
				this._templates[key] = Handlebars.compile(template);
			}
			return this._templates[key];
		},

		/**
		 * returns the info template for remote sharing
		 *
		 * @returns {Function}
		 * @private
		 */
		_getRemoteShareInfoTemplate: function() {
			return this._getTemplate('remoteShareInfo', TEMPLATE_REMOTE_SHARE_INFO);
		}
	});

	OC.Share.ShareDialogView = ShareDialogView;

})();